PBS NewsHour

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Former U.S. Secretary of State Hillary Clinton speaks in New Orleans on Nov. 1, 2014. The former first lady, U.S. senator and secretary of state planned to enter the 2016 Democratic race with an online video posted on social media on Sunday. Credit...
Iran and world powers arrive for nuclear talks at the Swiss Federal Institute of Technology in Lausanne (Ecol Polytechnique Federale De Lausanne) in Lausanne April 2, 2015. U.S. Secretary of State John Kerry has asked opponents of the Iran nuclear...
In a video posted to YouTube on Sunday, former U.S. Secretary of State Hillary Clinton announced her official run for president in 2016. “Americans have fought their way back from tough economic times, but the deck is still stacked in favor...
Florida Senator Marco Rubio speaks at the Conservative Political Action Conference at National Harbor in Maryland, February 27, 2015. Rubio is set to announce his bid for the 2016 Republican presidential nomination on Monday. Photo by Kevin Lamarque...
U.S. President Barack Obama and Cuba’s President Raul Castro shook hands on Friday at the Summit of the Americas in Panama April 11, 2015, a symbolically charged gesture as the pair seek to restore ties between the Cold War foes. President...
Solar panels fill the roofs of mausoleums at the cemetery in Santa Caloma de Gramenet, near Barcelona in 2008. Spain got 47 percent of its electricity in March 2015 from renewable sources like solar power. Credit: Gustau Nacarino/REUTERS. Solar...